 "Inocybe aeruginascens" is a small mycorrhizal mushroom with a conic to convex cap which becomes plane in age and is often fibrillose near the margin.It is usually less than 5 cm across, has a slightly darker blunt umbo and an incurved margin when young.The cap color varies from buff to light yellow brown, usually with greenish stains which disappear when the mushroom dries.